@article{GDZPPN002058103, title = {Some Geometric Properties of Polynomial Surfaces.}, journal = {Commentarii mathematici Helvetici}, volume = {37}, year = {1962}, pages = {214-220}, zbl = {0119.16602}, url = {http://dml.mathdoc.fr/item/GDZPPN002058103} }
Osserman, Robert. Some Geometric Properties of Polynomial Surfaces.. Commentarii mathematici Helvetici, Tome 37 (1962) pp. 214-220. http://gdmltest.u-ga.fr/item/GDZPPN002058103/